Receiving apparatus



Patented Aug. 26, 1930 UT STTES PATENT oFFIcE GLENN W. CARPENTER, OFSCHENECTADY, NEVI' YORK, .FI-SSIG-NOR TO GENERAL ELC- TRIC COMPANY, ACORPORATION 0F NEW YORK i RECEIVING APPARATUS Application filed April25,

My present invention relates to receiving apparatus for high frequencysignals, and more particularlyk to vacuum tube receiving equipment. y

One of the objects ci' my invention is to provide a receiving apparatuswhich will be compact and one in which the length of the leads whichconnect the vacuum tubes to other apparatus will be reduced to aminimum. A.

-. further object of my invention is to provide an apparatus in whichthe electrical connections may be readily made and in which a portion atleast oi' the auxiliary apparatus used in connection with the vacuumtubes and the connections to that apparatus will be securely protectedi'rom mechanical injury and from corrosion or oxidation. Y

The novel features which l believe to b characteristic of myinventionare set forth with particularity in the appended claims. My inventionitself however will best be understood by reference to the following`description taken in connection with the accompanying drawing in whichFig. 1 is a longitudinal vertical cross section or an apparatusembodying my invention; Fig. 2 is a plan view ot the same with a portionof the cover broken away; and llig. 3 is a transverse crosssection alongthe line 3-3 of Fig. 1.

l have shown in the drawing a receiving apparatus employing sii; vacuumtubes ot' thev three-electrode type. The sockets for the vacuum tubesand a plurality oit' electrical devices employed in the circuitconnections :tor the tubes are enclosed in a receptacle 11, which ispreferably of conducting material but which may be made ot insulatingmaterial ii' desired. A block of slab 5 of insulating material fits intothe top oi' the receptacle 4;, this block 5 being secured by means ofscrews 6 to a cover 7, which entirely closes the top of the receptacleand is secured thereto by screws 8.

The bloclr 5 of insulating material is provided with openings 9 Jforreceiving the bases ot vacuum tubes and the cover 7 is provided withopenings 10, which register with the openings 9 in the bloclr 5.provided in the block 5 on one side of each 4of the openings 9 and thecover l is provided on Grooves 11 are 1924. Serial No. 709,066.

one side ot each opening 10 with a notch 12,

which registers with a corresponding groove 11. The necessary contactsprings 13 for making contact with the terminals ot the vacuum tube baseare secured to the under side of the block 5 by means of rivets 14. wtVVhen the vacuum tube base is inserted in one ot the openings in the coverand block 5 the usual pin on'the side of the base is in sorted throughthe notch 12. rlhe tube may then be rotated and the pin will engage theunder side of the cover 7 and hold the terminals on the tube base ingood contact with the springs 12. To prevent any accidental release or"the tube from good contact the metal ot the cover adjacent the notches12 is pressed downwardly, as indicated at 15, so that a tube cannotreadily be rotated and removed without first exerting a downward b v ofthe cover.

Suspended from the block 5 are a plurality oi electrical devices whichmay-be connected r1n the circuits ot1 the vacuum tubes.

The particular circuit connections employed in the apparatus illustratedform no part of my present invention and therefore the specific circuitconnections are not illustrated or described. My invention is obviouslyapplicable to any circuit connection desired. Among the diiierent piecesott apparatus indicated in the drawing are `tour transformers 1G, 1'?,18 and 19, adapted for use in transe forming high frequency currents. Asingle set of punchings held together by rivets 2O is employed forcompleting the magnetic circuits of all of these transformers. Two othertransformers 21 and 22 adapted tor audio trequency transformation arealso shown. The transformers are all suspended from the block 5 by meansof screws 23 extending through the block 5 and into the upper edges ofthe transformer cores. hese screws are surrounded by spacing tubes 24for preserving a desired spacing between the transformers and the underside oi block 5.

Two parallel strips 25 ot insulating material are secured to the core ofthe high frequency transitormers by means of rivets 26.

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A plurality of notches are provided in these strips 25 tor engaging andholding condensers 27, which are included in tho vacuum tube circuitconnections. Each oj the con tact springs 13 is provided with a suitableterminal for making desired soldered connections between the vacuumtubes and the apparatus within the receptacle as well as tor makingconnections from the vacuum tubes and apparatus within the receptacle tothe operating batteries and other portions o'r the receiving` systemwhich cannot conveniently be enclosed in the receptacle. Some ot theseterminals, as tor example, the terminals marked 28, extend upwardly fromthe bloclr 5. @ther terminals marked 29 extend downwardly into thereceptacle a considerable distance. The block 5 also carries someadditional terminals 80, which extend downwardly into the receptacle. lnaddition to the apparatus already described li have indicated at 3l agrid leal: which is connected to two ot the downwardly extendedterminals.

All of the connections between the vacuum tubes and the apparat cle etand the other portions of the receiving system may be made by conductorsB2. Some et' these conductors are connected to terminals on top of theblock 5 and others are connected to terminals on the under side oitblock 5 and extended to the top ot the block through suitably locatedholes therein. All of the conductors 82 extend downwardly through anover-hanging portion 88 ot the block 5, this overhanging` portion beingcovered by the cover 7 so that when the apparatus is assembled none ofthe wiring within the receptacle is exposed to mechanical injury or thecollection of dust. Neither is there any danger ot breaking any of theconnections by pulling on the conductors 32. The arrangement otapparatus shown is also so compact that the length et leads requiredbetween the diiierent devices is reduced to a minimum.

After all of the electrical connections tor the apparatus to bc enclosedin the receptacle 4l have been made and tested, the receptacle 4: ispartly iilled with a hot molten insulating material which becomes solidwhen cold, such for example, as resin. rlhe assembled unit is theninserted in the receptacle and the insulatingl material allowed toharden. In the apparatus illustrated this insulating material 34C fillsall of the space within the receptacle to a level which is above thetops ot the transformers. Under some circumstances thc condensers 27'may also be surrounded by the solidilied insulating material. All oi theconnections trom the coils of the transformers are made to thedownwardly extending; terminals so that when the unit is comi etcd allot these connections are surrounded by the solidiiied insulatingmaterial and thus completely protected from mechanical injury as well asfrom exposure to the air and consequent oxidation or corrosion. Theterminals of some ot the condensers 27 also extend downwardly in orderthat the connections thereto may be similarly protected. As a result theonly soldered connections w iich are expos-ed to the aii` arecomparatively massive and rigid connections such as those which may bemade between the conductors 32 and the termina-ls carried on the upperside of block 5.

lWhile l have shown and described only one embodiment of my invention,it is apparent that many modilications may be made in the constructionand arrangement of the apparatus witnout departing trom the scope ot myinvention as sct forth in the appended claims. lt is also apparent thatmy invention is in 'no way dependent upon the use of anyvparticularcircuit connection but that it may be used with a great mult'plicity ofcircuit connections.

What l claim as new and desire to secure by Letters ljatent ol theUnited States is l. The combination in a high frequency receivingapparatus ot a receptacle, a block oit insulating material which titsinto the top ot said receptacle, said block being provided with aplurality or openings tor receiving the bases oli vacuum tubes, and aplurality ot electrical devices suspcn ded trom thn under side ot saidinsulating;` block, the space within receptacle surroundine` saiddevices being lilled with a solid insulatini;` material.

2. The combination in a high 'frequency signal receiving` apparatus ofreceptacle, a block o'l' insulating; material which lits into the top otsaid receptacle, said block being provided with a. plurality of openingstor receivingl the bases oi" vacuum tubos.y contact springs secured tothe under side ot said block 'for making contact with vacuum tubeterminals, and a plurality of electrical devices suspended from theunder side oil' said insulating' block, the space within said receptaclesurroundine, said devices being;- filled with. a solid insulatingmaterial. Y

3. The combination in a high frequency signal receiving apparatus ol" areceptacle, a block of insulating mat lrial which lits into the top otsaid receptacle, said bloclr being` provided with a plurality ofopenings 'for receiving the bases ot vacuum tubes, a plurality ofelectrical devices suspended from the under side et said insulating'block, and a cover tor said receptacle having openings therein whichregister with the openings in said block ot insulating' material. l

4. The combination in a high frequency signal receiving' apparatus of areceptacle, a block ot insulating material which lits into the top ofsaid receptacle, said block being provided with a plurality of openings'for receiving the bases of vacuum tubes, contact f springs secured tothe under side of said block for making Contact with vacuum tubeterminals, ayplurality of electrical devices suspended from the underside of said insulating bloclr, a cover for lsaid receptacle' havingopenings therein which register with the openings in said block ofinsulating material, and a notch in said cover on one side of each ofthe openings therein for receiving a pin in the base of a vacuum tubewhich pin will engage with the under side of said cover when the tube isrotated and hold the terminals of the tube base in good Contact withsaid contact springs.

6. The combination in a high frequency signal receiving apparatus of areceptacle, a block of insulating material which fits into the top ofsaid receptacle, two parallel stri s of insulating material suspendedfrom t e under side of said block and a plurality of electrical devicessecured to said strips.

7. The combination in a high frequency signal receiving apparatus of areceptacle, a block of insulating material which fits into the top ofsaid receptacle, two parallel strips of insulating material suspendedfrom the under side of said block, and a plurality of electrical deviceswhich are engaged in suitable notches cut in said strips.

8. The combination in a high frequency signal receiving apparatus of areceptacle, a bloclr of insulating material which fits into the top ofsaid receptacle, a pair of parallel strips of :insulating materialsuspended from the under side cf said block, and a plurality ofcondensers adapted for use in a high frequency signal receiving systemand which are engaged in notches in said strips of insulating material.

9. The combination in a high frequency signal receiving apparatus of areceptacle, a cover for said receptacle, a block of insulating materialwhich fits into the top of said receptacle and is secured to said cover,and a plurality of transformers adapted for use in a high frequencysignal receiving system suspended from the under side of said insulatingblock, the space within said receptacle surrounding said devices beingfilled with a solid insulating material.

10. The combination in a high frequency signal receiving apparatus of areceptacle, a block of insulating material which fits into the top ofsaid receptacle, a pair of strips of insulating material suspended fromthe un der side of said insulating block, said block being provided witha plurality of openings for receiving tloe bases of vacuum tubes,contact springs secured to the under side of said block for makingcontact with vacuum tube terminals, a plurality of electrical devicessecured to said strips of insulating material, and a plurality ofterminals carried by said block whereby electrical circuit connectionsmay readily be made between the vacuum tube contact springs, thedeviceswithin the receptacle and other devices outside of thereceptacle.

11. The combination in a high frequency signal receiving apparatus of areceptacle, a bloclr of insulating material which fits into the top ofsaid receptacle, a pair of strips of insulating mate 1ial suspended fromthe under side of said insulating block, a plurality of electricaldevices which are engaged in suitable notches cut in said strips, saidblock being provided with a plurality of openings for receiving thebases of vacuum tubes, contact springs secured to the under side of saidblock for making Contact with vacuum tube terminals, a plurality oftransformers adapted for use in a high frequency signal receiving systemsuspended from the under side of said block, and a plurality ofterminals carried by said block whereby electrical circuit connectionsmay readily be made between the vacuum tube contact springs, the deviceswithin the receptacle and other devices outside of the receptacle.

12. The combination in a high frequency signal receiving apparatus of areceptacle, a block of insulating material which fits into the top ofsaid receptacle, a pair of strips of insulating material suspended fromthe under sideiof said insulating block, a plurality of electricaldevices which are engaged in suitable notches cut in said strips, saidblock being provided with a plurality of openings for receiving thebases of vacuum tubes, contact springs secured to the under side of saidblock for making contact with vacuum tube terminals, a plurality oftransformers adapted for use in a high frequency signal receiving systemsuspended from the under side of said block of insulating material, anda plurality of terminals Carried by said block whereby electricalcircuit connections may readily be made between the vacuum tube Contactsprings, the devices within the receptacle and other devices outside ofthe recep-y tacle, the space within said receptacle surrounding saidtransforiners being filled with a solid insulating material.

13. The combination in a high frequency signal receiving apparatus of areceptacle, a

cover for said receptacle, a plurality of radio lic transformerssuspended from said cover, the space within said receptacle surroundingsaid devices being` filled with a solid insulating material and aplurality of soclets for vacuum tubes carried by said cover.

14. The combination iii a high frequency signal receivino` apparatus ofa receptacle, a block of insulating material which fits into the top ofsaid receptacle, Contact springs secured to the under side of saidbloclr and adapted to malte contactivith vacuum tube terminals, and aplurality of radio transformers supported from the under side 0f saidblock, the spacA Within said receptacle surrounding said transformersbeing filled with a solid insulating material.

15. rlhe combination in a high frequency signal receiving apparatus of areceptacle, a block of insulating material which fits into the top ofsaid receptacle, Contact springs secured to the under side of said blockand adapted to malte contact with vacuum tube terminals, a plurality ofradio transformers supported from the under side of said block, andterminals carried on the under side of said block to Which the coils ofsaid transformers are connected, said transformers and connections ofthe coils thereof to said terminals beingsurrounded by solid insulating'material.

16. The combination in a high frequency signal receiving apparatus of areceptacle, a bloclr of insulatingl material which fits into the top ofsaid receptacle, .and a plurality of transformers adapted for use in ahigh frequency signal receiving system secured to and suspended from theunder side of said block of insulating' material, terminals carried bysaid block to which the coils of said transformers are connected, saidtransformers and the connections of the coils thereof 'to said terminalsbeing surrounded by a solid insulating material.

17. The combination in a high frequency signal receiving apparatus of areceptacle, a cover for said receptacle, a plurality of transformersadapted for use in a high frequency signal receiving system locatedWithin said receptacle, terminals carried by said cover te which thecoils of said transformers are connected, said transformers and thepoint of connection of the coils thereof to said terminals beingsurrounded by a solid insulating material.

18. The combination in a high frequency signal receiving apparatus of areceptacle, a block of insulating material which ts into the top of saidreceptacle, a plurality of electrical devices suspended from the underside of said insulating block, said blocl being provided with aplurality of openings for ie- -ceiving the bases of vacuum tubes,contact springs secured to the under side of said block for making`Contact With vacuum tube terminals, and a plurality of terminals car-

